#8120: ghc: panic! (the 'impossible' happened) ------------------------------------+------------------------------------- Reporter: EyalLotem | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Foo.hs:6:3:ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for i386-unknown-linux): kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug The source file has to contain, merely: {{{ l :: m a -> t m a l = undefined f :: a -> f b f = do x <- undefined l $ x undefined main = return () }}} This panic reproduces on at least: 7.6.1, 7.6.2, 7.6.3. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8120 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler